论文标题
恒星限制在光CP-even标量
Stellar limits on light CP-even scalar
论文作者
论文摘要
我们从观察到的太阳，红色巨人，白矮人和水平分支星星的灯光中重新审视了通用光CP-even标量粒子$ s $ $ s $ s $ $ s $ S $的天体约束。恒星核心中的$ s $的生产由电子核心bremsstrahung流程$ e + n \ to e + n + s $主导。 With the $S$ decay and reabsorption processes taken into consideration, we find that the stellar luminosity limits exclude a broad range of parameter space in the $S$ mass-mixing plane, with the scalar mass up to 350 keV and the mixing angle ranging from $7.0\times10^{-18}$ to $3.4\times10^{-3}$.我们还将恒星限制应用于SM的真实单词标量扩展，在那里我们可以将混合角与标量电势中的参数联系起来。在通用标量案例和真实单词扩展中，我们表明恒星限制了恒星的标量解释最近观察到的Xenon1t过量的标量在太阳中发出的$ S $颗粒。
We revisit the astrophysical constraints on a generic light CP-even scalar particle $S$, mixing with the Standard Model (SM) Higgs boson, from observed luminosities of the Sun, red giants, white dwarfs and horizontal-branch stars. The production of $S$ in the stellar core is dominated by the electron-nuclei bremsstrahlung process $e + N \to e + N + S$. With the $S$ decay and reabsorption processes taken into consideration, we find that the stellar luminosity limits exclude a broad range of parameter space in the $S$ mass-mixing plane, with the scalar mass up to 350 keV and the mixing angle ranging from $7.0\times10^{-18}$ to $3.4\times10^{-3}$. We also apply the stellar limits to a real-singlet scalar extension of the SM, where we can relate the mixing angle to the parameters in the scalar potential. In both the generic scalar case and the real-singlet extension, we show that the stellar limits preclude the scalar interpretation of the recently observed XENON1T excess in terms of the $S$ particles emitted from the Sun.
